Method of and apparatus for producing waterproofed receptacles



METHOD OF AND APPARATUS FORPRODUCING WATERPROOFED RECEPTACLES Filed Oct. 16, 1922) 2 Suomwheet l my w, 1923.v llz@ W. BENSON METHOD OF AND APPARATUS F'OR PRODUCING WATERPROOFED RECEPTACLES Filed ot. le, 1922 Sinusite-Sheet 2 l j@ j@ STATES WILLIAE EVEBET BENSON, 0F WILMINGTON, BABET'E. HETGD 0F AND APPARATUS FOR PRGDUCINGfWATEBPi:

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Application le October 16, 1922. eria No. 594,775.

To all 'whom t may concern.'

l Be it known that I, WILLIAM E. BENSON, a citizen of the United States, residin at Wilmington, county of Middlesex, and 0mmonwealth of Massachusetts, have invented certain new and useful Yimprovements in Methods of and Apparatus for Producing Waterproofed Receptacles, of which the following is a specification.

This invention relates to a method of and apparatus for producing waterprooed pa' per receptacles, and particularly paper drinking cups of the type wherein the bottom closure is a separate piece sealed to the wall of the cup.

One characteristic diiliculty in the prov duction yof cups of this type in commercial quantities consists in the union of the bottom closure to the cup wall. This is of necessity the' area of greatest weakness in this type of cup, and is usually united by coating the contacting surfaces of the blank and closure with glue or paran and pressin them together to seal them.

he object of my present invention is to provide a cup in which the contacting surfaces of these parts will be ositively pressed together and worked relative to each other in such manner as to cause them to firmly adhere to each other. To this end my invention consists inthe novel method of and ap aratus for accomplishing this object.

ccording to my invention this union is edected during the progress of the cup through the forming machine and as one of the series of operations performed on the cup 'in said machine. This is a feature of importance in that it does not slow down production by requiring that the blank be separately coated. As contemplated herein, the blank may he either glued or paratined, or both, and where paraiiined, the apparatus for working the contacting surfaces of the cup and closure is itself utilized as an applicator for the paradine.

This object, and various other features of advantage which will appear more particularly hereinafter, are secured in the apparatus and method of the present invention. 4

The construction of my cup, and the manner of and apparatus for producing it are described and illustrated in the accompanying specification and drawings, which like refe-rence characters are emp oyed to indicate corresmnding parts, and the throu hout characteristic features of novelty are particularly pointed out in the appended claims.

In the drawings:

'Flg )1 is an elevation, partly in section, o f apparatus for the practice of my invention, and showing the bottom closure of the cup being coated with adhesive.

F1gs. 2 and 3 are partial sections, particularly illustrating the manner of working the contacting surfaces of the cup wall and bottom closure relative to each other to cause them to firmly adhere to'each other.

F ig. 4 isa view similar to Fig. 2 and illustrating the adaptation of the apparatus shown in said figure as an applicator for paran in addition to its normal function of working the contacting surfaces or the cup wall and bottom closure relative to each other, and

Fig. 5 is a partial section through a linlshed cup particularly illustrating the angular relatlon of the cup wall to the Hangs thereof and also showing the inwardly rolled bead or rim at the upper ed e of the cup.

ln the type of cup selectedg trative of the principles involved, the cup blank is dinked out of transparent paper stock, if desired, in an ordinary dinking press, glued along one vertical edge and then rolled upon a forming mandrel to lap its opposite vertical edge over said coated ede. f

t this stage, the blank is formed to cup shape, as indicated at 1 in the drawings, but has not been bent at its bottom edge to provide the closure attaching flange 2 or rolled at its top edge to provide the inturned bead or rim 3, Fig. 5. As here shown, the cup blank is cut on a curve so as to dare up wardly from bottom to top when rolled te cup form.

After the cup blank is rolled to form, it is transferred to a forming and sealing machine where the bottom closure a is united thereto. Preferably such machine consists of an intermittently revoluble spider and a plurality of operatin station disposed about the orbital path of te spider and cooperating therewith.. The cycle o the machine, used to coat the flanges 5' closures d is as follows rlhe closures 4 are rst blanked out of a strip of suitable material and the Hanges 5 simultaneously formed thereon. The nent of the bottom herein as illuswhere glue is and 2 are next worked relative to each other to cause them to firmly adhere to each other, after which the cup with bottom attached is stripped from the machine and the bead 3 formed thereon, if a bead is desired, such bead being rolled either inwardly or outwardly as desired.

Where paraffin is used instead of glue, the gluing ste is omitted and the paraffin is applied at tie same station and by the same mechanism, which works the flanges 5 and 2 to ether.

or the purposes of this application, I have shown only such portions of my machine as are necessary to illustrate the novel steps in the method involved herein. Referring to Fig. 1, I have indicated at 6 the cam shaft of my machine which is journaled in spaced. bearings 7 and is driven from any suitable power source, as indicated at 8. Fast on the shaft is a spider 9 carrying a plurality of radially disposed mandrels 10.

Ater the bottom closure 4 is blanked out and flanged by the machine, the mandrel 10 upon which said blank is held is revolved until opposite the gluing station G of the machine, where it pauses while a glue applicator 11 reciprocating through a glue pot 12 and operated in properly timed relation to the rest of the machine from the cam shaft 6, takes up a supply of glue and spreads it upon the inner face of the flange 5 of the bottom closure 4 while said closure remains opposite the gluing station. The cup blank is then slip ed over the mandrel carr ing the adhesive y coated bottom piece 4 an the' bottom flange 2 is formed thereon and folded over the flange 5 of said bottom piece, after which the spider 9 revolves until the mandrel carryingr said blank and closure is oppositethe sea-ling station S of the machine, where it again pauses while a seating device 13 engages and presses the bottom piecel 4 against the flange 2 to firmly unite said parts.

As here shown, the seating device 13 is eccentrically mounted on a shaft 14 which is rotatably and slidably mounted in a bearing l5 on the machine frame. The shaft 14 is rotated by the belt and pulley 16, Fig. 1, and is moved towards and from the mandrel of the spider 9 by a lever 17 operated *inl properly ,timed relation to the-rest of the machine from the cam shaft 6.

The eccentric mounting of the revoluble seating device 13 causes said device to oscil late or rock when engaged with the bottom closure 4, as indicated diagrammatically in Fig. 3, and such weaving motion works the flanges 5 and 2 relative to each other to cause them to firmly adhere to each other.

Where paraffin is used instead of glue, the sea-ting device 13 is arranged to operate through a paraffin pot 18, Fig. 4, which is electrically or otherwise heated to maintain the paraflin in a liquid state. The seatin device therefore taires up a supply of li ui paraffin as it is moved towards the man rel and spreads such paraffin onto the bottom piece 4 upon engagement therewith and then works the paraffin into the flanges 5 and 3 by reason of its oscillatory or weaving motion.

While I have shown an eccentrically mounted, device having a weaving motion,

it will be understood that the union of thel flanges 5 and 2 may be otherwise effected.

'Various modifications in the construction of my receptacle, and in the manner of and apparatus for producing it, may obviously be resorted to within the limits of the appended claims.

What I therefore claim and desire to secure by Letters Patent is:

1. The method of manufacturing a waterproofed paper receptacle having a side Wall and a flanged bottom closure, consistin in adhesively coating the. flange of said Inettom closure while said closure is retained on a forming mandrel, in applying the side ing the lower enclosing said bottom closure flange, and 1n internally expanding the bottom closure flange against the side wall flan e to cause said flanges toadhere to each ot er.

2. The method of manufacturing a'waterproofed paper receptacle having a side wall and a flanged bottom closure consistin in adhesively coating the flange of said l(liettom closure while said closure is retained on a forming mandrel, in applyingthe side wall to said mandrel, in folding the lower edge of said side wall to provide a flange enclosing said bottom closure flange, and 1n bringing a seating device having a weaving motion against the bottom closure ange to work said flange relative to said side Wall flange whereby to cause said flanges'to adhere toieach other. A

3. The method of manufacturing a waterproofed paper receptacle having a side wall and a flanged bottom closure, consisting in assembling a flanged bottom closure on a forming mandrel, in ap lying the side Wall to said mandrel, in fol ing the lower edge of said side wall to provide a flange en'- closing said bottom closure flange, in moving a seating device through a coating suhstance to apply a coating to the bottom clolos sure flange, and in imparting a weaving moacetone :dange and cause said danges to tere to each other.

4. The method of uniting the dangied bota tom closure @i a waterproofed paper rea ceptacle to the hanged side wall of said rreceptacle, which consists in adhesively coat ing the bottom closure ange, and in bringing a seatingdevice having a weaving mo?- tion against said bottom closure Han to work said flange relative to said side wall Harige whereby to cause said to here to each other.

5. The method of uniting a1@ hanged bottom closure of' a waterprooed paperdrink ing receptacle to the anged, sidewall of said receptacle, which consists in assembling said side wall and lclosure upon a mandre with said side. wall bottom closure dange2 in moving a seating device through a coating substance to apply a coating to said bottom closure liange, and in imparting a weav' 4motion to said device when in contact wlth said bottom closure flange whereby to work said ange relative .to said side wall ange andcause said flanges to adhere to each other.

6. The method of uniting the flanged bottom closure 'of a waterproofed paper drinking receptacle to of said receptacle,

which consists in assembling. seid side wall and closure upon side ange enclosing said the anged side w' a mandrelwith said side Wall dange enclos ing said bottom ange and in moving an ecccntrically mounted rotatable seating device through a coating substance to apply a coating to said bottom closure ilange and to work said Harige relative to said sidewall ange and cause said dange's to adhere to4 each other.

7. Apparatus for 'the manufacture of a waterproofed paper receptacle having a hanged side wall and a anged bottom closure, comprising a mandrel upon which the wall and bottom closure are assembled with the side wall dange enclosing said bottom closure flange, a container for a coati substance, a shaft rotatably and slidably mounted through said container, and a seats ing device eccentrically mounted on said shaft and e'ective to slide through said container and take-up and apply a coatingA to -the bottom closure liange and to wor said Hange relative to the side wall Hange with a weaving motion effective to cause said anges to adhere to each other.

In testimony whereof aihx my signaturc in presence oftwo witnessesA LLI EVERET BENSGN.

Witnesses:

BARCLAY Aan, Mar Noonan. 

